CN115570915A

CN115570915A - Tire pressure sensor position identification device, system and method

Info

Publication number: CN115570915A
Application number: CN202210582743.9A
Authority: CN
Inventors: 吴定训
Original assignee: Hyundai Motor Co; Kia Corp
Current assignee: Hyundai Motor Co; Kia Corp
Priority date: 2021-06-21
Filing date: 2022-05-26
Publication date: 2023-01-06
Also published as: KR20220169792A; US20220404225A1

Abstract

The application relates to a tire pressure sensor position identification device, system and method. An embodiment tire pressure sensor position identifying device includes: a receiver configured to receive a signal from a tire pressure sensor mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference therebetween and to receive information on a wheel pulse count from a wheel speed sensor; and a controller configured to identify a location where the tire pressure sensor is installed based on the specific phase difference, the signal received from the tire pressure sensor, and the wheel pulse count.

Description

Tire pressure sensor position identification device, system and method

RELATED APPLICATIONS

This application claims the benefit of korean patent application No. 10-2021-0080332, filed on 21/6/2021, which is hereby incorporated by reference.

Technical Field

The present disclosure relates to an apparatus and method for identifying a location of a tire pressure sensor and a system including the same.

Background

A Tire Pressure Monitoring System (TPMS) is a system that receives information such as air pressure, temperature, and the like from tire pressure sensors mounted on respective wheels and displays a warning of low pressure and air pressure information for each wheel on a driver display window. A wheel speed sensor of a vehicle is a device capable of measuring a wheel rotation speed by recognizing wheel pulse information.

In the case of an automobile or van in which wheels have a single tire, the positions of four wheel sensors can be identified by using the TPMS sensors and vehicle information. However, in the case of a vehicle having a double tire at the rear wheel, it is difficult to recognize the positions of two sensors mounted on the inner wheel and the outer wheel. In other words, with the related art, it is difficult to determine whether low pressure occurs in the inner wheel or the outer wheel, and therefore, it is not possible to realize the high line TPMS showing each position of the low pressure tire. Accordingly, a technology for determining whether the TPMS sensor is mounted on the inner wheel or the outer wheel is required.

Disclosure of Invention

The present disclosure relates to an apparatus and a method for identifying a location of a tire pressure sensor and a system including the same. Certain embodiments relate to an apparatus and method for identifying a location of a tire pressure sensor of a dual tire and a system including the same.

Embodiments of the present disclosure may solve the problems occurring in the prior art while maintaining the advantages achieved by the prior art unaffected.

Embodiments of the present disclosure provide an apparatus and method for identifying a location of a tire pressure sensor of a dual tire, and a system including the same.

Another embodiment of the present invention provides a tire pressure sensor location identification apparatus and method for identifying the location of a tire pressure sensor of a dual tire and accurately determining the location of a tire having a reduced pressure, and a system including the same.

Another embodiment of the present invention provides a tire pressure sensor location identification apparatus and method for enabling a TPMS to be equipped in a commercial vehicle using dual tires, not only in a passenger car, and a system including the same.

Another embodiment of the present invention provides a tire pressure sensor location identification apparatus and method for economically identifying the location of a tire pressure sensor without an additional device by using signals of a tire pressure sensor and a wheel speed sensor of a dual-tire vehicle, and a system including the same.

Another embodiment of the present invention provides a tire pressure sensor location identification apparatus and method for enabling a TPMS to be mounted in a vehicle using dual tires and enabling a commercial vehicle using dual tires to safely travel by monitoring tire pressure in real time, and a system including the same.

The technical problems to be solved by the embodiments of the present disclosure are not limited to the above-described problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art to which the present disclosure pertains from the following description.

According to an embodiment of the present disclosure, a tire pressure sensor position identifying device includes: a receiver receiving a signal from a tire pressure sensor mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference and receiving information on a wheel pulse count from a wheel speed sensor; and a controller that identifies a location where the tire pressure sensor is installed based on the specific phase difference, the signal received from the tire pressure sensor, and the wheel pulse count.

In an embodiment, the controller may set the reference value of the wheel pulse count difference based on the number of serrations of the tone wheel of the wheel speed sensor and the specific phase difference of the tire pressure sensor.

In an embodiment, the controller may identify a location where the tire air pressure sensor is installed based on a wheel pulse count when the signal is received from the tire air pressure sensor.

In an embodiment, the controller may identify the location where the air pressure sensor is installed by comparing a difference between the wheel pulse count at the time of receiving the signal from the air pressure sensor and a preset reference value of a wheel pulse count difference.

In an embodiment, the controller may determine whether each air pressure sensor is mounted on an inner wheel or an outer wheel of the vehicle based on whether a difference between wheel pulse counts at the time of receiving signals from the air pressure sensors is equal to a preset reference value of a wheel pulse count difference.

In an embodiment, the receiver may receive the generated signal each time the tire pressure sensor is located at a specific point of the rotating wheel of the vehicle.

According to another embodiment of the present invention, a tire pressure sensor location identification system includes: a tire pressure sensor that is mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference therebetween and transmits a signal to a tire pressure sensor position identification device; a wheel speed sensor that transmits information on a wheel pulse count to the tire pressure sensor position identification device; and a tire pressure sensor position identifying device that identifies a position where the tire pressure sensor is installed, based on the specific phase difference, the signals received from the tire pressure sensors, and the wheel pulse counts.

In an embodiment, the tire pressure sensor position identification means may set a reference value of the wheel pulse count difference based on the number of serrations of the tone wheel of the wheel speed sensor and a specific phase difference of the tire pressure sensor.

In an embodiment, the tire air pressure sensor position identification means may identify the position where the tire air pressure sensor is installed based on the wheel pulse count when the signal is received from the tire air pressure sensor.

In an embodiment, the tire air pressure sensor location identification means may identify the location where the tire air pressure sensor is installed by comparing a difference between the wheel pulse count at the time of receiving the signal from the tire air pressure sensor and a preset reference value of the wheel pulse count difference.

In an embodiment, the tire air pressure sensor location identifying means may determine whether each tire air pressure sensor is installed at an inner wheel or an outer wheel of the vehicle based on whether a difference between wheel pulse counts at the time of receiving signals from the tire air pressure sensors is equal to a preset reference value of the wheel pulse count difference.

In an embodiment, the tire air pressure sensor may generate a signal each time the tire air pressure sensor is located at a specific point of a rotating wheel of the vehicle and may transmit the signal to the tire air pressure sensor location identification device.

In an embodiment, the tire pressure sensor may measure acceleration and may determine whether the tire pressure sensor is located at a specific point of a wheel of the vehicle based on the measured acceleration.

According to another embodiment of the present disclosure, a tire pressure sensor location identification method includes: transmitting through tire pressure sensors mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference therebetween; transmitting a signal to a tire pressure sensor position recognition device, transmitting information on a wheel pulse count to the tire pressure sensor position recognition device by a wheel speed sensor, and recognizing by the tire pressure sensor position recognition device, a position where the tire pressure sensor is installed based on the specific phase difference, the signal received from the tire pressure sensor, and the wheel pulse count.

In an embodiment, the tire air pressure sensor position identifying method may further include setting, by the tire air pressure sensor position identifying device, a reference value of the wheel pulse count difference based on the number of serrations of the tone wheel of the wheel speed sensor and the specific phase difference of the tire air pressure sensor.

In an embodiment, identifying the location where the tire air pressure sensor is mounted may include identifying, by the tire air pressure sensor location identification means, the location where the tire air pressure sensor is mounted based on a wheel pulse count when receiving a signal from the tire air pressure sensor.

In an embodiment, identifying the location where the air pressure sensor is installed may include identifying the location where the air pressure sensor is installed by the air pressure sensor location identification means by comparing a difference between the wheel pulse count at the time of receiving the signal from the air pressure sensor and a preset reference value of the wheel pulse count difference.

In an embodiment, identifying the location where the tire air pressure sensor is mounted may include determining, by the tire air pressure sensor location identifying means, whether each tire air pressure sensor is mounted on an inner wheel or an outer wheel of the vehicle based on whether a difference between wheel pulse counts at the time of receiving the signals from the tire air pressure sensors is equal to a preset reference value of the wheel pulse count difference.

In an embodiment, the transmitting the signal to the tire pressure sensor position identifying device may include: each time the tire pressure sensor is located at a specific point of the rotating wheel of the vehicle, a signal is generated by the tire pressure sensor and transmitted to the tire pressure sensor position identification means.

In an embodiment, generating and transmitting a signal to the tire air pressure sensor position identifying device each time the tire air pressure sensor is located at a specific point of a rotating wheel of the vehicle may include: the acceleration is measured by the tire pressure sensor and it is determined whether the tire pressure sensor is located at a specific point of the wheel of the vehicle based on the measured acceleration.

Drawings

The above and other objects, features and advantages of the embodiments of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

fig. 1 is a block diagram illustrating a tire pressure sensor location identification apparatus according to an embodiment of the present disclosure;

fig. 2 is a block diagram illustrating a tire pressure sensor location identification system according to an embodiment of the present disclosure;

fig. 3A and 3B are views illustrating tire pressure sensors mounted on inner and outer wheels of a vehicle according to an embodiment of the present disclosure;

fig. 4 is a view showing information on wheel pulse counts obtained by a wheel speed sensor according to an embodiment of the present disclosure;

fig. 5 is a view illustrating signals generated by a tire pressure sensor according to an embodiment of the present disclosure;

fig. 6 shows a graph depicting a signal generated by a tire pressure sensor and information on a wheel pulse count obtained by a wheel speed sensor according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a process of identifying a location where a tire air pressure sensor is installed by a tire air pressure sensor location identification device according to an embodiment of the present disclosure; and

fig. 8 is a flowchart illustrating a tire pressure sensor location identification method according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Note that, when a reference numeral is attached to a component in each drawing, the same reference numeral is also attached to a component in other drawings when the same or corresponding component is displayed. In addition, in describing embodiments of the present disclosure, detailed descriptions of well-known features or functions will be omitted so as not to unnecessarily obscure the subject matter of the present disclosure.

In describing components according to embodiments of the present disclosure, terms such as first, second, "a," "B," "a," "B," etc. may be used. These terms are only intended to distinguish one element from another element, and do not limit the nature, order, or sequence of the elements. Unless otherwise defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is equivalent to the contextual meaning in the relevant art and should not be interpreted as having an ideal or excessively formal meaning unless expressly defined as having an ideal or excessively formal meaning in this application.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to fig. 1 to 8.

Fig. 1 is a block diagram illustrating a tire pressure sensor location identification device according to an embodiment of the present disclosure.

Referring to fig. 1, the tire pressure sensor location identifying device 100 may include a receiver 110 and a controller 120.

The tire pressure sensor position recognition apparatus 100 according to the embodiment of the present disclosure may be implemented inside or outside the vehicle. The tire pressure sensor position identifying device 100 may be integrally formed with a control unit inside the vehicle, or may be implemented as a separate hardware device and may be connected with the control unit of the vehicle through a connection device.

For example, the tire air pressure sensor position identifying device 100 may be integrated with a vehicle, may be implemented in a form of being mounted/attached to the vehicle as a vehicle-independent component, or may be implemented in a form of being integrated with a vehicle in a part and being mounted/attached to the vehicle as a vehicle-independent component in another part.

The receiver 110 may receive a signal from a tire pressure sensor mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference therebetween and may receive information on a wheel pulse count from a wheel speed sensor.

For example, the receiver 110 may receive a Radio Frequency (RF) signal from a tire pressure sensor.

For example, the receiver 110 may receive information about the wheel pulse count from a wheel speed sensor via Controller Area Network (CAN) communication.

For example, receiver 110 may include communication circuitry capable of receiving RF signals and communication circuitry providing CAN communication functionality.

For example, the receiver 110 may be directly or indirectly connected with the controller 120 through wireless or wired communication, and may transmit the signal received from the tire pressure sensor and the wheel pulse count information received from the wheel speed sensor to the controller 120.

For example, the tire pressure sensor may be mounted on the inner wheel and the outer wheel of the vehicle having the same rotation axis so as to have a specific phase difference, and may rotate together with the inner wheel and the outer wheel of the vehicle while always maintaining the specific phase difference when the inner wheel and the outer wheel of the vehicle rotate at the same speed.

For example, the receiver 110 may receive a signal generated each time the tire pressure sensor is located at a specific point of the wheel of the vehicle.

For example, a particular point of a wheel of the vehicle may be determined as the highest point of the wheel. In this case, the receiver 110 may receive the RF signal generated by the tire pressure sensor whenever the tire pressure sensor is located at the highest point of the wheel of the vehicle.

The controller 120 may identify a location where the tire pressure sensor is installed based on the specific phase difference, the signal received from the tire pressure sensor, and the wheel pulse count.

For example, the controller 120 may determine whether each tire pressure sensor is mounted on an inner wheel or an outer wheel of the vehicle.

For example, the controller 120 may previously store information about a specific phase difference set when the tire pressure sensor is mounted on the tire in the memory, and may use the specific phase difference in identifying a location where the tire pressure sensor is mounted.

For example, the controller 120 may identify a location where the tire pressure sensor is installed based on the wheel pulse count when the signal is received from the tire pressure sensor.

Specifically, the controller 120 may monitor a wheel pulse count received from a wheel speed sensor in real time, and may store the wheel pulse count value in a memory when receiving a signal from a tire pressure sensor.

Further, the controller 120 may store the wheel pulse count value at the next time of receiving a signal from the tire pressure sensor in the memory.

For example, the controller 120 may identify a location where the air pressure sensor is installed by comparing a difference between the wheel pulse count at the time of receiving the signal from the air pressure sensor and a preset reference value of the wheel pulse count difference.

Specifically, the controller 120 may calculate a difference between wheel pulse count values when signals are received from the tire pressure sensor by comparing the calculated wheel pulse count difference with a preset reference value for the wheel pulse count difference, and may identify a location where the tire pressure sensor is installed.

For example, the controller 120 may set a reference value of the wheel pulse count difference based on the number of serrations of the tone wheel and a specific phase difference of the tire pressure sensor.

For example, the controller 120 may calculate a wheel pulse count generated by a specific phase difference of the tire pressure sensor, and may set the calculated wheel pulse count value as a reference value for the wheel pulse count difference.

For example, the controller 120 may set a reference value of the wheel pulse count difference such that the wheel pulse count is proportional to the number of serrations of the tone wheel and the specific phase difference of the tire pressure sensor.

For example, the controller 120 may determine whether each air pressure sensor is mounted on an inner wheel or an outer wheel of the vehicle based on whether a difference between wheel pulse counts when signals are received from the air pressure sensors is equal to a preset reference value of the wheel pulse count difference.

For example, in the case where the tire pressure sensor mounted on the outer wheel is advanced by a certain phase difference from the tire pressure sensor mounted on the inner wheel, when the wheel pulse count when the first reception signal is received minus the wheel pulse count when the second reception signal is received is equal to a reference value of the wheel pulse count difference set based on the certain phase difference, the controller 120 may determine that the tire pressure sensor corresponding to the first received signal is mounted on the inner wheel and the tire pressure sensor corresponding to the second received signal is mounted on the outer wheel.

For example, in the case where the tire pressure sensor mounted on the outer wheel is advanced by a certain phase difference from the tire pressure sensor mounted on the inner wheel, when the wheel pulse count when the first received signal is received minus the wheel pulse count when the second received signal is received is not equal to the reference value of the wheel pulse count difference set based on the certain phase difference, the controller 120 may determine that the tire pressure sensor corresponding to the first received signal is mounted on the outer wheel and the tire pressure sensor corresponding to the second received signal is mounted on the inner wheel.

Fig. 2 is a block diagram illustrating a tire pressure sensor location identification system according to an embodiment of the present disclosure.

Referring to fig. 2, the tire air pressure sensor position recognition system 200 may include a tire air pressure sensor 210, a wheel speed sensor 220, and a tire air pressure sensor position recognition device 230.

The tire pressure sensor 210 may be installed on the inner wheel and the outer wheel of the vehicle to have a certain phase difference, and may transmit a signal to the tire pressure sensor position identification device 230.

For example, the tire pressure sensor 210 may be mounted on and rotatable with inner and outer wheels of the vehicle having the same rotational axis.

For example, the tire air pressure sensor 210 may include a communication circuit that performs a primary function of measuring the air pressure in the tire, and generates and transmits an RF signal to the tire air pressure sensor location identification device 230.

For example, the tire air pressure sensor 210 may generate a signal each time the tire air pressure sensor 210 is located at a specific point of a wheel of the vehicle, and may transmit the signal to the tire air pressure sensor location identifying device 230.

For example, the tire air pressure sensor 210 may generate an RF signal each time the tire air pressure sensor 210 is located at the highest point of the wheel of the vehicle, and may transmit the RF signal to the tire air pressure sensor location identifying device 230.

Since the tire air pressure sensor 210 transmits a signal to the tire air pressure sensor location identification device 230 each time the tire air pressure sensor 210 is located at a specific point of the wheel of the vehicle, the tire air pressure sensor location identification device 230 may periodically receive the signal from the tire air pressure sensor 210.

For example, the tire air pressure sensor 210 may measure acceleration, and it may be determined whether the tire air pressure sensor 210 is located at a specific point of a wheel of the vehicle based on the measured acceleration.

For example, the tire pressure sensor 210 may be installed to measure acceleration in the rotational direction of the wheel and may measure acceleration in the rotational direction of the wheel in real time.

When the wheel rotates, the degree to which gravity is applied in the rotational direction of the wheel may be changed, and thus the acceleration measured by the tire pressure sensor 210 may be changed in real time.

A process in which the tire air pressure sensor 210 measures acceleration and determines whether the tire air pressure sensor 210 is located at a specific point of a wheel of the vehicle based on the measured acceleration will be described in more detail below with reference to fig. 5.

The wheel speed sensor 220 may transmit information on the wheel pulse count to the tire pressure sensor position identification device 230.

For example, the wheel speed sensor 220 may include a communication circuit capable of transmitting information on the wheel pulse count to the tire pressure sensor position identification device 230 through CAN communication.

For example, the wheel speed sensor 220 may measure a wheel pulse count generated by the serrations of the tone wheel, and may measure a wheel pulse count corresponding to the number of serrations of the tone wheel when the wheel makes one rotation.

The wheel pulse count measured by the wheel speed sensor 220 will be described in more detail below with reference to fig. 4.

The tire air pressure sensor location identification device 230 may identify the location where the tire air pressure sensor 210 is installed based on the specific phase difference, the signal received from the tire air pressure sensor 210, and the wheel pulse count.

For example, the tire air pressure sensor location identification device 230 may identify the location where the tire air pressure sensor 210 is installed based on the wheel pulse count when the signal is received from the tire air pressure sensor 210.

For example, the tire air pressure sensor location identifying device 230 may set a reference value of the wheel pulse count difference based on the number of serrations of the tone wheel and the specific phase difference of the tire air pressure sensor 210.

For example, the air pressure sensor location identification device 230 may identify the location where the air pressure sensor 210 is installed by comparing the difference between the wheel pulse count at the time of receiving the signal from the air pressure sensor 210 and a preset reference value of the wheel pulse count difference.

For example, the tire air pressure sensor location identifying device 230 may determine whether each tire air pressure sensor 210 is installed at an inner wheel or an outer wheel of the vehicle based on whether a difference between wheel pulse counts at the time of receiving signals from the tire air pressure sensors 210 is equal to a preset reference value of the wheel pulse count difference.

The tire air pressure sensor position recognition device 230 is the same as the tire air pressure sensor position recognition device 100 of fig. 1, and thus a detailed description thereof will be omitted.

Fig. 3A and 3B are views illustrating tire pressure sensors mounted on inner and outer wheels of a vehicle according to an embodiment of the present disclosure.

Referring to fig. 3A, the tire air pressure sensor 210 may include an air pressure sensor 303 mounted on an outer wheel 301 of the vehicle and an air pressure sensor 304 mounted on an inner wheel 302 of the vehicle.

The air pressure sensor 303 mounted on the outer wheel 301 of the vehicle may obtain the air pressure of the outer wheel 301 and may rotate together with the outer wheel 301 while the vehicle is running.

The tire pressure sensor 304 mounted on the inner wheel 302 of the vehicle may obtain the tire pressure of the inner wheel 302 and may rotate together with the inner wheel 302 while the vehicle is running.

The air pressure sensor 303 mounted on the outer wheel 301 of the vehicle may generate an RF signal and transmit the RF signal to the air pressure sensor location identification device 100 or 230 every time the air pressure sensor 303 is located at a specific point of the outer wheel 301 during rotation of the outer wheel 301, and the air pressure sensor 304 mounted on the inner wheel 302 of the vehicle may generate an RF signal and transmit the RF signal to the air pressure sensor location identification device 100 or 230 every time the air pressure sensor 304 is located at a specific point of the inner wheel 302 during rotation of the inner wheel 302.

Referring to fig. 3B, an air pressure sensor 303 mounted on an outer wheel 301 of the vehicle and an air pressure sensor 304 mounted on an inner wheel 302 of the vehicle may be mounted on the outer wheel 301 and the inner wheel 302 so as to have a specific phase difference 305.

For example, the specific phase difference 305 may be defined as a difference between an angle from a preset reference line whose center coincides with the rotation axis of the wheel of the vehicle to the air pressure sensor 303 mounted on the outer wheel 301 of the vehicle and an angle from the preset reference line to the air pressure sensor 304 mounted on the inner wheel 302 of the vehicle.

For example, the air pressure sensor 303 may be mounted on the outer wheel 301 of the vehicle such that a particular phase difference 305 in the rotational direction 306 of the wheel precedes the air pressure sensor 304 mounted on the inner wheel 302 of the vehicle.

When the outer wheel 301 and the inner wheel 302 having the same rotation axis rotate, the air pressure sensor 303 mounted on the outer wheel 301 of the vehicle and the air pressure sensor 304 mounted on the inner wheel 302 of the vehicle may rotate together while maintaining a certain phase difference 305.

Fig. 4 is a view showing information on a wheel pulse count obtained by a wheel speed sensor according to an embodiment of the present invention.

Referring to fig. 4 (i), the wheel speed sensor 402 may measure a wheel pulse count generated by the tone wheel 401 when the wheel is rotating.

For example, the wheel speed sensor 402 may measure the wheel pulse count by sensing the change in magnetic lines of force of the tone wheel 401.

Part (ii) of fig. 4 is a view showing a change in magnetic lines of force of the tone wheel 401 measured by the wheel speed sensor 402.

For example, the change in the magnetic lines of force of the tone wheel 401 measured by the wheel speed sensor 402 may periodically form a predetermined wheel pulse waveform while the wheel is rotating.

For example, based on a waveform generated by a change in magnetic lines of force of tone wheel 401, wheel speed sensor 402 may convert the waveform into a square wave form.

For example, the wheel speed sensor 402 may generate a wheel pulse waveform in the form of a square wave having a value of 1 in a positive level section and a value of 0 in a negative level section from a waveform generated by the tone wheel 401 changing magnetic lines of force.

Part (iii) of fig. 4 is a graph depicting wheel pulse count over time.

For example, the wheel speed sensor 402 may cumulatively count pulses in the wheel pulse waveform in the square wave form of part (ii) of fig. 4 in real time.

Since the wheel pulse count increases the number of serrations of the tone wheel 401 each time the wheel makes one revolution, the wheel speed sensor 402 can calculate in real time the remainder obtained by dividing the number of pulses of the accumulated count by the number of serrations of the tone wheel 401.

The wheel speed sensor 402 may transmit information related to the measured wheel pulse count to the tire pressure sensor position recognition device 100 or 230 through CAN communication.

Fig. 5 is a view illustrating signals generated by the tire pressure sensor according to an embodiment of the present disclosure.

Fig. 5 shows a process in which tire pressure sensors mounted on the inner wheel and the outer wheel of a vehicle measure acceleration while rotating together with the inner wheel and the outer wheel of the vehicle (for example, using the positions (i) to (v)).

For example, the air pressure sensor mounted on the inner and outer wheels of the vehicle may be configured to transmit the RF signal in a state where an acceleration value measured by an acceleration sensor included in the air pressure sensor is 1 g.

Here, 1g may be defined as an acceleration value representing 1 time of the acceleration of gravity.

For example, the air pressure sensor mounted on the outer wheel of the vehicle may be advanced by a phase difference of 90 degrees in the rotational direction of the wheel than the air pressure sensor mounted on the inner wheel of the vehicle.

Here, only a phase difference of 90 degrees is provided for illustration, and the phase difference may be determined as a different angle.

In position (i) of fig. 5, the air pressure sensor mounted on the outer wheel may be located at the uppermost position of the outer wheel and may measure an acceleration of 1g, and the air pressure sensor mounted on the inner wheel may be located at the leftmost position of the inner wheel and may measure an acceleration of 0 g.

Here, og may be defined as an acceleration value representing 0 times the acceleration of gravity.

In this case, the tire pressure sensor mounted on the outer wheel may generate an RF signal and may transmit the RF signal to the tire pressure sensor position identification device.

In the position (ii) of fig. 5, the air pressure sensor mounted on the outer wheel may be located at the rightmost position of the outer wheel and may measure an acceleration of 0g, and the air pressure sensor mounted on the inner wheel may be located at the uppermost position of the inner wheel and may measure an acceleration of 1 g.

In this case, the tire pressure sensor mounted on the inner wheel may generate an RF signal and may transmit the RF signal to the tire pressure sensor location identification device.

In the position (iii) of fig. 5, the air pressure sensor mounted on the outer wheel may be located at the lowest position of the outer wheel and may measure an acceleration of-1 g, and the air pressure sensor mounted on the inner wheel may be located at the rightmost position of the inner wheel and may measure an acceleration of 0 g.

Here, -1g may be defined to mean an acceleration value of-1 times the acceleration of gravity.

In this case, the two tire pressure sensors may not generate the RF signal.

In position (iv) of fig. 5, the air pressure sensor mounted on the outer wheel may be located at the leftmost position of the outer wheel and may measure an acceleration of 0g, and the air pressure sensor mounted on the inner wheel may be located at the lowermost position of the inner wheel and may measure an acceleration of-1 g.

In this case, the two tire pressure sensors may not generate the RF signal.

In the position (v) of fig. 5, the air pressure sensor mounted on the outer wheel may be located at the uppermost position of the outer wheel and may measure an acceleration of 1g, and the air pressure sensor mounted on the inner wheel may be located at the leftmost position of the inner wheel and may measure an acceleration of 0 g.

The tire pressure sensors mounted on the inner wheel and the outer wheel of the vehicle may transmit the RF signal once when the wheels of the vehicle make one rotation.

Fig. 6 shows a graph depicting a signal generated by a tire pressure sensor and information on a wheel pulse count obtained by a wheel speed sensor according to an embodiment of the present invention.

The upper graph (i) of fig. 6 is a graph depicting acceleration measured by the tire pressure sensor over time, and the lower graph (ii) of fig. 6 is a graph depicting wheel pulse count measured by the wheel speed sensor over time.

For example, the air pressure sensor mounted on the inner and outer wheels of the vehicle may be configured to transmit the RF signal when an acceleration value measured by an acceleration sensor included in the air pressure sensor is 1g as a maximum value. The tire pressure sensor may transmit the RF signal each time the tire pressure sensor is located at the uppermost position of the wheel.

For example, the tire air pressure sensor position identifying device may store a wheel pulse count value at a time 601 at which an RF signal is received from an air pressure sensor installed on an outer wheel of the vehicle, and the wheel pulse count value may be.

For example, the tire air pressure sensor location identifying device may store a wheel pulse count value at a time 602 when an RF signal is received from an air pressure sensor mounted on an inner wheel of the vehicle, and the wheel pulse count value may be +.

The tire air pressure sensor position identifying means may be obtained by calculating the difference between the wheel pulse count value at time 601 and the wheel pulse count value at time 602.

For example, when the wheel makes one revolution, a wheel pulse count corresponding to the number of serrations of the tone wheel may be generated.

When the tire pressure sensor transmits the RF signal at the same position of the wheel every predetermined period, the wheel pulse count may be increased by a value obtained by multiplying the RPM of the wheel by the number of teeth of the tone wheel.

For example, in the case where the number of teeth of the tone wheel is 48 and the wheel pulse count when the first RF signal is transmitted is α, the wheel pulse count when the next RF signal is transmitted may be 48 × n + α increased by n (RPM) × 48 (the number of teeth of the tone wheel).

Here, the number of the jaggies set to 48 is only exemplary, and the number of the jaggies may be determined to be a different value.

Therefore, the tire pressure sensor can measure a remainder obtained by dividing the wheel pulse count measured by the wheel speed sensor over time by the number of serrations of the tone wheel.

That is, in this case, even if RPM (n) of the wheel is considered, the wheel pulse count difference corresponding to the two tire pressure sensors may be a specific value of 48 × n + 12.

Fig. 7 is a flowchart illustrating a process of identifying a location where the tire air pressure sensor is installed by the tire air pressure sensor location identifying device according to an embodiment of the present disclosure.

Referring to fig. 7, the tire air pressure sensor position recognition device 100 or 230 may recognize a phase difference ψ of the tire air pressure sensors mounted on the outer wheel and the inner wheel (S701).

For example, the tire air pressure sensor position identifying device 100 or 230 may identify the phase difference ψ of the tire air pressure sensors mounted on the outer wheel and the inner wheel by information about a specific phase difference which is stored in a memory in advance and set when the tire air pressure sensors are mounted on the tire.

The tire air pressure sensor position recognition device 100 or 230 may recognize the number of serrations of the sound wheel (S702) after recognizing the phase difference ψ of the tire air pressure sensors mounted on the outer wheel and the inner wheel (S701).

For example, the tire pressure sensor position identifying device 100 or 230 may identify the number of serrations of the phonic wheel through information about the number of serrations of the phonic wheel, which is set and stored at the time of designing and manufacturing the vehicle.

The tire air pressure sensor position identifying device 100 or 230 may calculate the pulse count Cdiff generated from the phase difference ψ based on the number of serrations of the tone wheel (S703) after identifying the number of serrations of the tone wheel (S702).

For example, the tire air pressure sensor position identifying device 100 or 230 may calculate the pulse count generated by the phase difference ψ such that the pulse count is proportional to the number of serrations of the tone wheel and the phase difference ψ.

For example, the tire air pressure sensor position identifying device 100 or 230 may calculate the pulse count generated by the phase difference by the equation Cdiff = Cp (number of serrations of the tone wheel) × ψ (phase difference)/360 °.

For example, when the number of serrations of the tone wheel is 48 and the phase difference ψ is 90 degrees, the tire air pressure sensor position identifying device 100 or 230 may calculate the pulse count generated by the phase difference ψ as 48 (the number of serrations of the tone wheel) × 90 (phase difference)/360 ° =12.

The tire pressure sensor location identification device 100 or 230 may calculate the pulse count generated by the phase difference based on the number of teeth of the color wheel, and then may determine the number of teeth of the tire pressure sensor S from the two tire pressure sensors S ₁ And S ₂ The wheel pulse count input upon receipt of the signal is stored as C _s1 And C _s2 (S704)(S703)。

For example, the tire pressure sensor position recognition device 100 or 230 may monitor information of wheel pulse counts received from two wheel speed sensors installed on an inner wheel and an outer wheel in real time, and may detect the number of wheel pulses received from two tire pressure sensors S ₁ And S ₂ The wheel pulse count at the time of receiving the RF signal is stored as C _s1 And C _s2 。

The tire pressure sensor position recognition device 100 or 230 may be in the state of being driven by two tire pressure sensors S ₁ And S ₂ The wheel pulse count input at the time of signal reception is stored as C _s1 And C _s2 Then (S704) judges (C) _s1 -C _s2 ) Whether or not it is equal to Cdiff (S705).

For example, when (C) _s1 -C _s2 ) And Cdiff, the tire pressure sensor position identification device 100 or 230 may determine as (C) _s1 -C _s2 ) Equal to Cdiff.

In determining (C) _s1 -C _s2 ) After whether or not equal to Cdiff (S705), when (C) is determined _s1 -C _s2 ) Equal to Cdiff (yes of S705), the tire pressure sensor position identification device 100 or 230 may determine as the tire pressure sensor S ₁ Mounted on the inner wheel and a tire pressure sensor S ₂ Is mounted on the outer wheel (S706).

For example, when (C) _s1 -C _s2 ) When the quantity is equal to Cdiff, the wheel pulse count of the tire pressure sensor S1 is larger than that of the tire pressure sensor S ₂ The wheel pulse count of (1) is large phase difference, so the tire pressure sensor position recognition device 100 or 230 can determine the tire pressure sensor S ₁ Mounted on the inner wheel, a tyre pressure sensor S ₂ Is arranged on the outer wheel.

In determining (C) _s1 -C _s2 ) After determining whether or not equal to Cdiff (S705), when (C) is determined _s1 -C _s2 ) Not equal to Cdiff (no at S705), the tire pressure sensor position identification device 100 or 230 may determine as the tire pressure sensor S ₁ Mounted on the outer wheel and a tyre pressure sensor S ₂ Is mounted on the inner wheel (S707).

For example, when (C) _s1 -C _s2 ) When not equal to Cdiff, the tire pressure sensor S ₁ Is not more than the tire pressure sensor S ₂ The wheel pulse counts are different, and thus, the tire pressure sensor position identification device 100 or 230 can determine the tire pressure sensor S ₁ Not mounted on the inner wheel (i.e. tyre pressure sensor S) ₁ Mounted on the outer wheel) and a tire pressure sensor S ₂ Not mounted on the outer wheel (i.e. tyre pressure sensor S) ₂ Mounted on the inner wheel).

Referring to fig. 8, the tire air pressure sensor location identification method may include a step of transmitting a signal to the tire air pressure sensor location identification device by the tire air pressure sensor (S810), a step of transmitting information on a wheel pulse count to the tire air pressure sensor location identification device by the wheel speed sensor (S820), and a step of identifying a location where the tire air pressure sensor is installed by the tire air pressure sensor location identification device based on a specific phase difference, a signal received from the tire air pressure sensor, and the wheel pulse count (S830).

For example, the step (S810) of the air pressure sensor transmitting the signal to the air pressure sensor position identification device may include: and a step in which the tire pressure sensor generates a signal and transmits the signal to the tire pressure sensor position identification means each time the tire pressure sensor is located at a specific point of a wheel of the vehicle.

For example, the step of generating a signal by the tire pressure sensor and transmitting the signal to the tire pressure sensor location identification means each time it is located at a specific point of a wheel of the vehicle may include: a step of measuring acceleration by the tire pressure sensor and determining whether the tire pressure sensor is located at a specific point of a wheel of the vehicle based on the measured acceleration.

For example, the tire air pressure sensor position identifying method may further include the step of setting, by the tire air pressure sensor position identifying device, a reference value of the wheel pulse count difference based on the number of serrations of the tone wheel and the specific phase difference of the tire air pressure sensor.

For example, the step (S830) of the tire air pressure sensor location identifying device identifying the mounting location of the tire air pressure sensor may include a step of the tire air pressure sensor location identifying device identifying the mounting location of the tire air pressure sensor based on the wheel pulse count when the signal is received from the tire air pressure sensor.

For example, the step of identifying the location where the air pressure sensor is mounted (S830) by the air pressure sensor location identification means may include the step of identifying the location where the air pressure sensor is mounted by comparing the difference between the reference value of the wheel pulse count difference and the wheel pulse count when the signal is received from the air pressure sensor by the air pressure sensor location identification means.

For example, the step of identifying the location where the air pressure sensor is mounted by the air pressure sensor location identification means (S830) may include the step of determining whether each air pressure sensor is mounted on the outer wheel or the inner wheel based on whether the difference between the wheel pulse counts at the time of receiving the signals from the air pressure sensors is equal to the reference value of the wheel pulse count difference.

The operations of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in a hardware or software module executed by a processor, or in a combination of the two. A software module may reside on a storage medium (i.e., memory and/or storage) such as RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable disk, or a CD-ROM.

A storage medium may be coupled to the processor, and the processor may read information from, and record information in, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). The ASIC may reside in a user terminal. In other instances, the processor and the storage medium may reside as discrete components in a user terminal.

The apparatus and method for identifying the location of the tire pressure sensor and the system including the same according to the embodiments of the present disclosure have the following effects.

According to embodiments of the present disclosure, an apparatus and a method for identifying a location of a tire pressure sensor of a dual tire and a system including the same may be provided.

According to the embodiments of the present disclosure, the tire pressure sensor location identification apparatus and method and the system including the same may identify the location of the tire pressure sensor of a dual tire and may accurately determine the location of a tire having a reduced pressure.

According to embodiments of the present invention, a tire pressure sensor location identification apparatus and method and a system including the same may enable a TPMS to be mounted in a commercial vehicle using dual tires, rather than only a passenger car.

According to an embodiment of the present disclosure, a tire pressure sensor location identification apparatus and method and a system including the same may economically identify the location of a tire pressure sensor without additional devices by using signals of a tire pressure sensor and a wheel speed sensor of a vehicle using a dual tire.

According to embodiments of the present invention, a tire pressure sensor location identification apparatus and method and a system including the same may enable a TPMS to be mounted in a vehicle using dual tires, and may enable a commercial vehicle using dual tires to safely travel by monitoring tire pressure in real time.

In addition, embodiments of the present disclosure may provide various effects of direct or indirect recognition.

In the above, although the present disclosure has been described with reference to the embodiments and the accompanying drawings, the present disclosure is not limited thereto, but various modifications and changes can be made by those skilled in the art to which the present disclosure pertains without departing from the spirit and scope of the present disclosure claimed in the appended claims.

Accordingly, the embodiments of the present disclosure are provided to explain the spirit and scope of the disclosure and not to limit them, so that the spirit and scope of the disclosure is not limited by the embodiments. The scope of the present disclosure should be construed based on the appended claims, and all technical ideas within the scope equivalent to the claims should be included in the scope of the present disclosure.

Claims

1. A tire pressure sensor position identification device comprising:

a receiver configured to receive a signal from a tire pressure sensor mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference therebetween and to receive information on a wheel pulse count from a wheel speed sensor; and

a controller configured to identify a location where the tire air pressure sensor is installed based on the specific phase difference, the signal received from the tire air pressure sensor, and the wheel pulse count.

2. The tire pressure sensor position identification device according to claim 1, wherein the controller is configured to set a reference value of a wheel pulse count difference based on a number of serrations for tone wheels of the wheel speed sensor and a specific phase difference of the tire pressure sensor.

3. The tire air pressure sensor position identification device according to claim 1, wherein the controller is configured to identify a position where the tire air pressure sensor is installed based on the wheel pulse count when the signal is received from the tire air pressure sensor.

4. The tire air pressure sensor position identification device according to claim 1, wherein the controller is configured to identify the position where the tire air pressure sensor is installed by comparing a difference between the wheel pulse counts when the signals are received from the tire air pressure sensor with a preset reference value of a wheel pulse count difference.

5. The tire air pressure sensor location identification device according to claim 1, wherein the controller is configured to determine whether each of the tire air pressure sensors is mounted on the inner wheel or the outer wheel of the vehicle based on whether a difference between the wheel pulse counts at the time of receiving the signals from the tire air pressure sensors is equal to a preset reference value of a wheel pulse count difference.

6. The tire pressure sensor location identification device of claim 1, wherein the receiver is configured to receive the signal generated each time the tire pressure sensor is located at a particular point of rotation of a wheel of the vehicle.

7. A tire pressure sensor location identification system, comprising:

an air pressure sensor mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference therebetween, and configured to transmit a signal to an air pressure sensor position identification device;

a wheel speed sensor configured to transmit information on a wheel pulse count to the tire pressure sensor position identification device; and

the tire air pressure sensor location identification device is configured to identify a location where the tire air pressure sensor is installed based on the specific phase difference, the signal received from the tire air pressure sensor, and the wheel pulse count.

8. The tire air pressure sensor position identification system according to claim 7, wherein the tire air pressure sensor position identification means is configured to set a reference value of a wheel pulse count difference based on the number of serrations of a tone wheel for the wheel speed sensor and a specific phase difference of the tire air pressure sensor.

9. The tire air pressure sensor location identification system according to claim 7, wherein the tire air pressure sensor location identification device is configured to identify a location where the tire air pressure sensor is installed based on the wheel pulse count when the signal is received from the tire air pressure sensor.

10. The tire air pressure sensor position identification system according to claim 7, wherein the tire air pressure sensor position identification device is configured to identify the position where the tire air pressure sensor is installed by comparing a difference between the wheel pulse counts at the time of receiving the signal from the tire air pressure sensor with a preset reference value of a wheel pulse count difference.

11. The tire air pressure sensor position identification system according to claim 7, wherein the tire air pressure sensor position identification device is configured to determine whether each of the tire air pressure sensors is mounted on the inner wheel or the outer wheel of the vehicle based on whether a difference between the wheel pulse counts at the time of receiving the signals from the tire air pressure sensors is equal to a preset reference value of a wheel pulse count difference.

12. The tire air pressure sensor location identification system of claim 7, wherein the tire air pressure sensor is configured to generate and transmit the signal to the tire air pressure sensor location identification device each time the tire air pressure sensor is located at a specific rotation point of a wheel of the vehicle.

13. The tire air pressure sensor location identification system of claim 12, wherein the tire air pressure sensor is configured to measure acceleration and determine whether the tire air pressure sensor is located at a particular point of a wheel of the vehicle based on the measured acceleration.

14. A tire pressure sensor location identification method, comprising:

transmitting a signal to a tire pressure sensor position identification device through a tire pressure sensor mounted on an inner wheel and an outer wheel of a vehicle to have a certain phase difference between the inner wheel and the outer wheel;

transmitting information on the wheel pulse count to a tire pressure sensor position identification device through a wheel speed sensor; and

identifying, by the tire air pressure sensor location identifying device, a location where the tire air pressure sensor is installed based on the specific phase difference, the signal received from the tire air pressure sensor, and the wheel pulse count.

15. The tire pressure sensor location identification method according to claim 14, further comprising: with the tire pressure sensor position identifying device, a reference value of a wheel pulse count difference is set based on the number of serrations of a tone wheel for the wheel speed sensor and a specific phase difference of the tire pressure sensor.

16. The tire air pressure sensor location identification method according to claim 14, wherein identifying the location where the tire air pressure sensor is installed includes: identifying, by the tire pressure sensor position identifying device, a position where the tire pressure sensor is installed based on the wheel pulse count when the signal is received from the tire pressure sensor.

17. The tire air pressure sensor location identification method according to claim 14, wherein identifying the location where the tire air pressure sensor is installed includes: by the tire pressure sensor location identification means, a location where the tire pressure sensor is installed is identified by comparing a difference between the wheel pulse counts when the signals are received from the tire pressure sensor with a preset reference value of a wheel pulse count difference.

18. The tire air pressure sensor location identification method according to claim 14, wherein identifying the location where the tire air pressure sensor is installed includes: determining, by the tire pressure sensor position identification means, whether each of the tire pressure sensors is mounted on the inner wheel or the outer wheel of the vehicle based on whether a difference between the wheel pulse counts at the time of receiving the signals from the tire pressure sensors is equal to a preset reference value of a wheel pulse count difference.

19. The tire pressure sensor location identification method according to claim 14, wherein the transmitting the signal to the tire pressure sensor location identification device includes: generating the signal by the tire pressure sensor and transmitting the signal to the tire pressure sensor position identification device each time the tire pressure sensor is located at a specific rotation point of a wheel of the vehicle.

20. The tire air pressure sensor position identification method according to claim 19, wherein generating and transmitting the signal to the tire air pressure sensor position identification device each time the tire air pressure sensor is located at a specific rotation point of a wheel of the vehicle includes: measuring acceleration by the tire air pressure sensor and determining whether the tire air pressure sensor is located at a specific point of a wheel of the vehicle based on the measured acceleration.